As for me, It was 4 or 5 days. I was just awake due to having a bunch of stuff to keep me entertained like playing a bunch of games. The second time was like 3 days which was just watching anime for 3 days without sleeping. It was a good marathon. Another factor is that I don't really get tired often and I only sleep at a max of 4 hours most of the time (recently my sleep schedule has been up and down due to alarm clock not working as intended.) So I just stay awake for long periods of time if I'm entertained or need to stay awake to finish something like a project.

I'd say about 30 hours. I was going to Six Flags for the first time and I couldn't get to sleep. But as soon as I got back on the van(I went with a bunch of cousins and their friends) when the day was over I was out for the entire trip back home.